1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6da7b14dd2ba848f21489647818f9d8051d8820c2d646a3c04105156ccafe8. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09935601-c4b5-4463-b406-ce52594ba908.json and https://artists.proofprofile.net/proofs/artist/09935601-c4b5-4463-b406-ce52594ba908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd253150ec554045ff3adb8997dac1a7116b558204dbcd752500f4a03c94d5bbd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2125118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0051b6f18b0bac13745f1a47fe8eaf26e25d8b258db4260daf4a44f5cfd59d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6670900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e8fa400d381af4c477cc8486ac25f5553ff8810c3bcb9a3bcd2900591c6555. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6670900440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346bbf18aeea679c0222c11f7e61277cce23e540fe144cf97fcb4491ded3c6c6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6670900442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d7258797f894c5aba388c29ecb1e47a9b3e39908ed1e53757270da51da2f00. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6670900443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6766b192065e1967bcc8494afd493fd35db64cbdc546ee081b978459912681. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1459629.
Bésame Morenita y a la Luz de los Cocuyos - Tanguillos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2934bbc4b7309f2da33ea68c3bea5ae6b478ca591c3a8f1c5a3cd0b9d9c18253. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1459631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14e792eb35ec62c3b2c3090167f2120eae8b315f5968b7f5e4adc74e35457a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1459635.
Siete Mares y Ya Llegó Tu Enamorado - Tanguillos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456615b1c2fea5698499d5e8a0eae7f21000ed93ec12cdcb809b25b73b7a366. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1459637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f443af7aa62e8ce122e0234e692f4d0821e6269e473695fe02d6ccfcfa21e4f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES04D2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380c154fb30b3b502a6c9f1d4721053d9fc59e219cbed63a5d7fb0546da25f0c. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA032009512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e31e984effe1627a030f92afd842e2114000b0089a075c2844ac82dba765b08. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES04D1600293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095ac33c80e05d214dc1f05999d241ec7d506587418c56427d685adb86ef6c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES04D1600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe85382ce6fc03f406d76e9c3152a1d35f438df6a064a16393254f02bd8a1ec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYX82244699.